'use strict'
class Point {
	constructor(x,y) {
		this.x = x
		this.y = y
	}
	toString() {
		return `Point(${this.x},${this.y})`
	}
}

class PointSet {

	constructor() {
		this.map = new Map()
		this[Symbol.iterator] = this.values
	}

	add(item) {
		this.map.set(item.toString(), item)
	}

	get values() {
		return this.map.values()
	}

	get size() {
		return this.map.size
	}
}

function random() {
	return Math.floor(Math.random()*10)
}

let coords = new PointSet()

while (coords.size < 100) {
	coords.add(new Point(random(),random()))
}

console.log(coords.values)